
<!DOCTYPE HTML>
<html lang="zh-hans" >
<head>
    <meta charset="UTF-8">
    <meta content="text/html; charset=utf-8" http-equiv="Content-Type">
    <title>9.6：通用“动画切换”组件（AnimatedSwitcher） · 《Flutter实战》</title>
    <meta http-equiv="X-UA-Compatible" content="IE=edge"/>
    <meta name="baidu-site-verification" content="Y34sAqDKUH"/>
    <meta name="theme-color" content="#ffffff">
    <!--<meta name="description" content="">-->
    <meta name="description" content="《Flutter实战》是Flutter中文网（https://flutterchina.club）开源的电子书，旨在帮助开发者系统化的了解并学习Flutter。">
    <meta name="keywords" content="flutter实战,flutter书籍,flutter电子书,flutter中文网 ">
    <meta name="generator" content="GitBook 3.2.3">
    
    <meta name="author" content="wendux 824783146@qq.com">
    
    
    
    
    <link rel="stylesheet" href="https://pcdn.flutterchina.club/gitbook/style.css">

    
    
    
    <link rel="stylesheet" href="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-search-pro/search.css">
    
    
    
    <link rel="stylesheet" href="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-ace/ace.css">
    
    
    
    <link rel="stylesheet" href="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-splitter/splitter.css">
    
    
    
    <link rel="stylesheet" href="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-prism/prism.css">
    
    
    
    <link rel="stylesheet" href="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-donate/plugin.css">
    
    
    
    <link rel="stylesheet" href="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-fontsettings/website.css">
    
    
    

    

    
        
    
        
    
        
    
        
    
        
    

    
    
    
    <meta name="HandheldFriendly" content="true"/>
    <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
    <meta name="apple-mobile-web-app-capable" content="yes">
    <meta name="apple-mobile-web-app-status-bar-style" content="black">
    <link rel="apple-touch-icon-precomposed" sizes="152x152" href="https://pcdn.flutterchina.club/gitbook/images/apple-touch-icon-precomposed-152.png">
    <link rel="shortcut icon" href="https://pcdn.flutterchina.club/gitbook/images/favicon.ico" type="image/x-icon">

    
    <link rel="next" href="animated_widgets.html" />
    
    
    <link rel="prev" href="stagger_animation.html" />
    

    <style>
        .pull-right > i {
            font-size: 25px;
            color: #777 !important;
            cursor: pointer;

        }

        .pull-right > i:hover {
            color: #777 !important;
        }

        body {
            font-size: 15px !important;
        }

        a[href='../todo.html'], a[href='todo.html'] {
            color: #888 !important;
        }

        .copyright {
            text-align: center;
            margin: 80px 16px 8px 16px;
            padding-top: 16px;
            border-top: #eee 1px solid;
            color: grey;
            font-size: .9em;
        }

        .f-links a{
            text-decoration: underline;
            color: dodgerblue !important;
        }

        .f-links a:hover{
            opacity: .8 !important;
        }

        /*.ad {*/
            /*color: white;*/
            /*text-align: center;*/
            /*background: url(https://img.alicdn.com/tfs/TB1Huu7vMmTBuNjy1XbXXaMrVXa-2880-400.png);*/
            /*background-size: cover;*/
            /*cursor: pointer;*/
            /*margin-bottom: 30px;*/
            /*padding: 18px*/
        /*}*/

        /*.ad:hover {*/
            /*opacity: .8;*/
        /*}*/

        .buy-btn {
            text-decoration: none !important;
            padding: 8px 18px;
            border: #268bd2 1px solid !important;
            display: inline-block !important;
            border-radius: 25px;
            color: #268bd2;
            margin-top: 10px;
        }

        .buy-btn:hover {
            transition: all ease 200ms;
            box-shadow: #555 2px 5px 10px;
            background: #eee;
            color: dodgerblue !important;
        }

        .maoyun{
            padding-top: 5px;
        }


    </style>
</head>
<body>
<!--<div id="ad" style="display: none">-->
<!--<div class="ad ad0"-->
<!--onclick="_track('aliyun','https://promotion.aliyun.com/ntms/yunparter/invite.html?userCode=8hhi4dts')">-->
<!--<div style="font-size: 1.3em; padding-right: 120px; position: relative; top: 12px">阿里云新春特惠</div>-->
<!--<div style="color:orange; font-size: 13px">限时红包 最高￥<span style="font-size: 40px">1888</span></div>-->
<!--</div>-->
<!--<div class="ad ad1"-->
<!--onclick="_track('aliyun-puhui','https://promotion.aliyun.com/ntms/act/qwbk.html?spm=5176.11533457.1089570.10.74e877e33jtaGy&userCode=8hhi4dts')">-->
<!--<div style="font-size: 1.5em;">阿里云全民云计算-新春特惠</div>-->
<!--<div style="color:orange; font-size: 18px;padding-top: 4px;">普惠上云，云服务器1核1G仅需293元/年</div>-->
<!--</div>-->
<!--</div>-->

<div class="ad"  style="text-align:center; padding-bottom:30px; display: none"><a href="https://item.jd.com/12816296.html" onclick="buy('img')" title='点击购买' target="_blank"><img style="height:250px;box-shadow: #aaa 5px 5px 10px;" src="https://pcdn.flutterchina.club/imgs/book.png"/></a>  <br/> <a class="buy-btn" onclick="buy('img')" href="https://item.jd.com/12816296.html" title='点击购买' target="_blank"> 购买实体书 </a></div>


<div class="book">
    <div class="book-summary">
        
            
<div id="book-search-input" role="search">
    <input type="text" placeholder="输入并搜索" />
</div>

            
                <nav role="navigation">
                


<ul class="summary">
    
    
    
        
        <li>
            <a href="https://flutterchina.club" target="_blank" class="custom-link"><div><img height=20 style='position:relative; top:5px; padding-right:5px ' src='https://cdn.jsdelivr.net/gh/flutterchina/website@1.0/images/favicon.png'/> Flutter中文网</div></a>
        </li>
    
    

    
    <li class="divider"></li>
    

    
        
        
    
        <li class="chapter " data-level="1.1" data-path="../">
            
                <a href="../">
            
                    
                    简介
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="1.2" data-path="../intro.html">
            
                <a href="../intro.html">
            
                    
                    前言
            
                </a>
            

            
        </li>
    

    
        
        <li class="header">入门篇</li>
        
        
    
        <li class="chapter " data-level="2.1" data-path="../chapter1/">
            
                <a href="../chapter1/">
            
                    
                    第一章：起步
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="2.1.1" data-path="../chapter1/mobile_development_intro.html">
            
                <a href="../chapter1/mobile_development_intro.html">
            
                    
                    1.1：移动开发技术简介
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.2" data-path="../chapter1/flutter_intro.html">
            
                <a href="../chapter1/flutter_intro.html">
            
                    
                    1.2：初识Flutter
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.3" data-path="../chapter1/install_flutter.html">
            
                <a href="../chapter1/install_flutter.html">
            
                    
                    1.3：搭建Flutter开发环境
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.1.4" data-path="../chapter1/dart.html">
            
                <a href="../chapter1/dart.html">
            
                    
                    1.4：Dart语言简介
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="2.2" data-path="../chapter2/">
            
                <a href="../chapter2/">
            
                    
                    第二章：第一个Flutter应用
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="2.2.1" data-path="../chapter2/first_flutter_app.html">
            
                <a href="../chapter2/first_flutter_app.html">
            
                    
                    2.1：计数器示例
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.2.2" data-path="../chapter2/flutter_router.html">
            
                <a href="../chapter2/flutter_router.html">
            
                    
                    2.2：路由管理
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.2.3" data-path="../chapter2/flutter_package_mgr.html">
            
                <a href="../chapter2/flutter_package_mgr.html">
            
                    
                    2.3：包管理
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.2.4" data-path="../chapter2/flutter_assets_mgr.html">
            
                <a href="../chapter2/flutter_assets_mgr.html">
            
                    
                    2.4：资源管理
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.2.5" data-path="../chapter2/flutter_app_debug.html">
            
                <a href="../chapter2/flutter_app_debug.html">
            
                    
                    2.5：调试Flutter APP
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.2.6" data-path="../chapter2/thread_model_and_error_report.html">
            
                <a href="../chapter2/thread_model_and_error_report.html">
            
                    
                    2.6：Dart线程模型及异常捕获
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="2.3" data-path="../chapter3/">
            
                <a href="../chapter3/">
            
                    
                    第三章：基础组件
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="2.3.1" data-path="../chapter3/flutter_widget_intro.html">
            
                <a href="../chapter3/flutter_widget_intro.html">
            
                    
                    3.1：Widget简介
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.3.2" data-path="../chapter3/state_manage.html">
            
                <a href="../chapter3/state_manage.html">
            
                    
                    3.2：状态管理
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.3.3" data-path="../chapter3/text.html">
            
                <a href="../chapter3/text.html">
            
                    
                    3.3：文本、字体样式
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.3.4" data-path="../chapter3/buttons.html">
            
                <a href="../chapter3/buttons.html">
            
                    
                    3.4：按钮
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.3.5" data-path="../chapter3/img_and_icon.html">
            
                <a href="../chapter3/img_and_icon.html">
            
                    
                    3.5：图片和Icon
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.3.6" data-path="../chapter3/radio_and_checkbox.html">
            
                <a href="../chapter3/radio_and_checkbox.html">
            
                    
                    3.6：单选框和复选框
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.3.7" data-path="../chapter3/input_and_form.html">
            
                <a href="../chapter3/input_and_form.html">
            
                    
                    3.7：输入框和表单
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.3.8" data-path="../chapter3/progress.html">
            
                <a href="../chapter3/progress.html">
            
                    
                    3.8：进度指示器
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="2.4" data-path="../chapter4/">
            
                <a href="../chapter4/">
            
                    
                    第四章：布局类组件
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="2.4.1" data-path="../chapter4/intro.html">
            
                <a href="../chapter4/intro.html">
            
                    
                    4.1：布局类组件简介
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.4.2" data-path="../chapter4/row_and_column.html">
            
                <a href="../chapter4/row_and_column.html">
            
                    
                    4.2：线性布局（Row、Column）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.4.3" data-path="../chapter4/flex.html">
            
                <a href="../chapter4/flex.html">
            
                    
                    4.3：弹性布局（Flex）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.4.4" data-path="../chapter4/wrap_and_flow.html">
            
                <a href="../chapter4/wrap_and_flow.html">
            
                    
                    4.4：流式布局（Wrap、Flow）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.4.5" data-path="../chapter4/stack.html">
            
                <a href="../chapter4/stack.html">
            
                    
                    4.5：层叠布局（Stack、Positioned）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.4.6" data-path="../chapter4/alignment.html">
            
                <a href="../chapter4/alignment.html">
            
                    
                    4.6：对齐与相对定位（Align）
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="2.5" data-path="../chapter5/">
            
                <a href="../chapter5/">
            
                    
                    第五章：容器类组件
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="2.5.1" data-path="../chapter5/padding.html">
            
                <a href="../chapter5/padding.html">
            
                    
                    5.1：填充（Padding）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.5.2" data-path="../chapter5/constrainedbox_and_sizebox.html">
            
                <a href="../chapter5/constrainedbox_and_sizebox.html">
            
                    
                    5.2：尺寸限制类容器（ConstrainedBox等）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.5.3" data-path="../chapter5/decoratedbox.html">
            
                <a href="../chapter5/decoratedbox.html">
            
                    
                    5.3：装饰容器（DecoratedBox）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.5.4" data-path="../chapter5/transform.html">
            
                <a href="../chapter5/transform.html">
            
                    
                    5.4：变换（Transform）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.5.5" data-path="../chapter5/container.html">
            
                <a href="../chapter5/container.html">
            
                    
                    5.5：Container容器
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.5.6" data-path="../chapter5/material_scaffold.html">
            
                <a href="../chapter5/material_scaffold.html">
            
                    
                    5.6：Scaffold、TabBar、底部导航
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.5.7" data-path="../chapter5/clip.html">
            
                <a href="../chapter5/clip.html">
            
                    
                    5.7：剪裁（Clip）
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="2.6" data-path="../chapter6/">
            
                <a href="../chapter6/">
            
                    
                    第六章：可滚动组件
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="2.6.1" data-path="../chapter6/intro.html">
            
                <a href="../chapter6/intro.html">
            
                    
                    6.1：可滚动组件简介
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.6.2" data-path="../chapter6/single_child_scrollview.html">
            
                <a href="../chapter6/single_child_scrollview.html">
            
                    
                    6.2：SingleChildScrollView
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.6.3" data-path="../chapter6/listview.html">
            
                <a href="../chapter6/listview.html">
            
                    
                    6.3：ListView
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.6.4" data-path="../chapter6/gridview.html">
            
                <a href="../chapter6/gridview.html">
            
                    
                    6.4：GridView
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.6.5" data-path="../chapter6/custom_scrollview.html">
            
                <a href="../chapter6/custom_scrollview.html">
            
                    
                    6.5：CustomScrollView
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.6.6" data-path="../chapter6/scroll_controller.html">
            
                <a href="../chapter6/scroll_controller.html">
            
                    
                    6.6：滚动监听及控制（ScrollController）
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="2.7" data-path="../chapter7/">
            
                <a href="../chapter7/">
            
                    
                    第七章：功能型组件
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="2.7.1" data-path="../chapter7/willpopscope.html">
            
                <a href="../chapter7/willpopscope.html">
            
                    
                    7.1：导航返回拦截（WillPopScope）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.7.2" data-path="../chapter7/inherited_widget.html">
            
                <a href="../chapter7/inherited_widget.html">
            
                    
                    7.2：数据共享（InheritedWidget）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.7.3" data-path="../chapter7/provider.html">
            
                <a href="../chapter7/provider.html">
            
                    
                    7.3： 跨组件状态共享（Provider）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.7.4" data-path="../chapter7/theme.html">
            
                <a href="../chapter7/theme.html">
            
                    
                    7.4：颜色和主题（Theme）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.7.5" data-path="../chapter7/futurebuilder_and_streambuilder.html">
            
                <a href="../chapter7/futurebuilder_and_streambuilder.html">
            
                    
                    7.5：异步UI更新（FutureBuilder、StreamBuilder）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="2.7.6" data-path="../chapter7/dailog.html">
            
                <a href="../chapter7/dailog.html">
            
                    
                    7.6：对话框详解
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    

    
        
        <li class="header">进阶篇</li>
        
        
    
        <li class="chapter " data-level="3.1" data-path="../chapter8/">
            
                <a href="../chapter8/">
            
                    
                    第八章：事件处理与通知
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="3.1.1" data-path="../chapter8/listener.html">
            
                <a href="../chapter8/listener.html">
            
                    
                    8.1：原始指针事件处理
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.1.2" data-path="../chapter8/gesture.html">
            
                <a href="../chapter8/gesture.html">
            
                    
                    8.2：手势识别
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.1.3" data-path="../chapter8/eventbus.html">
            
                <a href="../chapter8/eventbus.html">
            
                    
                    8.3：全局事件总线
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.1.4" data-path="../chapter8/notification.html">
            
                <a href="../chapter8/notification.html">
            
                    
                    8.4：通知(Notification)
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="3.2" data-path="./">
            
                <a href="./">
            
                    
                    第九章：动画
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="3.2.1" data-path="intro.html">
            
                <a href="intro.html">
            
                    
                    9.1：Flutter动画简介
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.2.2" data-path="animation_structure.html">
            
                <a href="animation_structure.html">
            
                    
                    9.2：动画结构
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.2.3" data-path="route_transition.html">
            
                <a href="route_transition.html">
            
                    
                    9.3：自定义路由过渡动画
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.2.4" data-path="hero.html">
            
                <a href="hero.html">
            
                    
                    9.4：Hero动画
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.2.5" data-path="stagger_animation.html">
            
                <a href="stagger_animation.html">
            
                    
                    9.5：交织动画
            
                </a>
            

            
        </li>
    
        <li class="chapter active" data-level="3.2.6" data-path="animated_switcher.html">
            
                <a href="animated_switcher.html">
            
                    
                    9.6：通用“动画切换”组件（AnimatedSwitcher）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.2.7" data-path="animated_widgets.html">
            
                <a href="animated_widgets.html">
            
                    
                    9.7：动画过渡组件
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="3.3" data-path="../chapter10/">
            
                <a href="../chapter10/">
            
                    
                    第十章：自定义组件
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="3.3.1" data-path="../chapter10/intro.html">
            
                <a href="../chapter10/intro.html">
            
                    
                    10.1：自定义组件方法简介
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.3.2" data-path="../chapter10/combine.html">
            
                <a href="../chapter10/combine.html">
            
                    
                    10.2：组合现有组件
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.3.3" data-path="../chapter10/turn_box.html">
            
                <a href="../chapter10/turn_box.html">
            
                    
                    10.3：组合实例：TurnBox
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.3.4" data-path="../chapter10/custom_paint.html">
            
                <a href="../chapter10/custom_paint.html">
            
                    
                    10.4：自绘组件（CustomPaint与Canvas）
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.3.5" data-path="../chapter10/gradient_circular_progress_demo.html">
            
                <a href="../chapter10/gradient_circular_progress_demo.html">
            
                    
                    10.5：自绘实例：圆形渐变进度条(自绘)
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="3.4" data-path="../chapter11/">
            
                <a href="../chapter11/">
            
                    
                    第十一章：文件操作与网络请求
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="3.4.1" data-path="../chapter11/file_operation.html">
            
                <a href="../chapter11/file_operation.html">
            
                    
                    11.1：文件操作
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.4.2" data-path="../chapter11/http.html">
            
                <a href="../chapter11/http.html">
            
                    
                    11.2：Http请求-HttpClient
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.4.3" data-path="../chapter11/dio.html">
            
                <a href="../chapter11/dio.html">
            
                    
                    11.3：Http请求-Dio package
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.4.4" data-path="../chapter11/download_with_chunks.html">
            
                <a href="../chapter11/download_with_chunks.html">
            
                    
                    11.4：实例：Http分块下载
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.4.5" data-path="../chapter11/websocket.html">
            
                <a href="../chapter11/websocket.html">
            
                    
                    11.5：WebSocket
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.4.6" data-path="../chapter11/socket.html">
            
                <a href="../chapter11/socket.html">
            
                    
                    11.6：使用Socket API
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.4.7" data-path="../chapter11/json_model.html">
            
                <a href="../chapter11/json_model.html">
            
                    
                    11.7：Json转Dart Model类
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="3.5" data-path="../chapter12/">
            
                <a href="../chapter12/">
            
                    
                    第十二章：包与插件
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="3.5.1" data-path="../chapter12/develop_package.html">
            
                <a href="../chapter12/develop_package.html">
            
                    
                    12.1：开发package
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.5.2" data-path="../chapter12/platform-channel.html">
            
                <a href="../chapter12/platform-channel.html">
            
                    
                    12.2：平台通道简介
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.5.3" data-path="../chapter12/develop_plugin.html">
            
                <a href="../chapter12/develop_plugin.html">
            
                    
                    12.3：开发Flutter插件
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.5.4" data-path="../chapter12/android_implement.html">
            
                <a href="../chapter12/android_implement.html">
            
                    
                    12.4：插件开发：实现Android端API
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.5.5" data-path="../chapter12/ios_implement.html">
            
                <a href="../chapter12/ios_implement.html">
            
                    
                    12.5：插件开发：实现IOS端API
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.5.6" data-path="../chapter12/texture_platformview.html">
            
                <a href="../chapter12/texture_platformview.html">
            
                    
                    12.6：Texture和PlatformView
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="3.6" data-path="../chapter13/">
            
                <a href="../chapter13/">
            
                    
                    第十三章：国际化
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="3.6.1" data-path="../chapter13/multi_languages_support.html">
            
                <a href="../chapter13/multi_languages_support.html">
            
                    
                    13.1：让App支持多语言
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.6.2" data-path="../chapter13/locallization_implement.html">
            
                <a href="../chapter13/locallization_implement.html">
            
                    
                    13.2：实现Localizations
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.6.3" data-path="../chapter13/intl.html">
            
                <a href="../chapter13/intl.html">
            
                    
                    13.3：使用Intl包
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.6.4" data-path="../chapter13/faq.html">
            
                <a href="../chapter13/faq.html">
            
                    
                    13.4：国际化常见问题
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    
        <li class="chapter " data-level="3.7" data-path="../chapter14/">
            
                <a href="../chapter14/">
            
                    
                    第十四章：Flutter核心原理
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="3.7.1" data-path="../chapter14/flutter_ui_system.html">
            
                <a href="../chapter14/flutter_ui_system.html">
            
                    
                    14.1：Flutter UI系统
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.7.2" data-path="../chapter14/element_buildcontext.html">
            
                <a href="../chapter14/element_buildcontext.html">
            
                    
                    14.2：Element和BuildContext
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.7.3" data-path="../chapter14/render_object.html">
            
                <a href="../chapter14/render_object.html">
            
                    
                    14.3：RenderObject与RenderBox
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.7.4" data-path="../chapter14/flutter_app_startup.html">
            
                <a href="../chapter14/flutter_app_startup.html">
            
                    
                    14.4：Flutter从启动到显示
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="3.7.5" data-path="../chapter14/image_and_cache.html">
            
                <a href="../chapter14/image_and_cache.html">
            
                    
                    14.5：Flutter图片加载与缓存
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    

    
        
        <li class="header">实例篇</li>
        
        
    
        <li class="chapter " data-level="4.1" data-path="../chapter15/intro.html">
            
                <a href="../chapter15/intro.html">
            
                    
                    第十五章：一个完整的Flutter应用
            
                </a>
            

            
            <ul class="articles">
                
    
        <li class="chapter " data-level="4.1.1" data-path="../chapter15/intro.html">
            
                <a href="../chapter15/intro.html">
            
                    
                    15.1：应用简介
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="4.1.2" data-path="../chapter15/code_structure.html">
            
                <a href="../chapter15/code_structure.html">
            
                    
                    15.2：APP代码结构
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="4.1.3" data-path="../chapter15/models.html">
            
                <a href="../chapter15/models.html">
            
                    
                    15.3：Model类定义
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="4.1.4" data-path="../chapter15/globals.html">
            
                <a href="../chapter15/globals.html">
            
                    
                    15.4：全局变量及共享状态
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="4.1.5" data-path="../chapter15/network.html">
            
                <a href="../chapter15/network.html">
            
                    
                    15.5：网络请求封装
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="4.1.6" data-path="../chapter15/entry.html">
            
                <a href="../chapter15/entry.html">
            
                    
                    15.6：App入口及首页
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="4.1.7" data-path="../chapter15/login_page.html">
            
                <a href="../chapter15/login_page.html">
            
                    
                    15.7：登录页
            
                </a>
            

            
        </li>
    
        <li class="chapter " data-level="4.1.8" data-path="../chapter15/language_and_theme_setting.html">
            
                <a href="../chapter15/language_and_theme_setting.html">
            
                    
                    15.8：多语言和多主题
            
                </a>
            

            
        </li>
    

            </ul>
            
        </li>
    

    

    <li class="divider"></li>

    <li>
        <a href="https://www.gitbook.com" target="blank" class="https://pcdn.flutterchina.club/gitbook-link">
            本书使用 GitBook 发布
        </a>
    </li>
</ul>


                </nav>
            
        
    </div>

    <div class="book-body">
        
            <div class="body-inner">
                
                    

<div class="book-header" role="navigation">
    
    <a class="btn pull-right" aria-label="GitHub">
        <i class="fa fa-edit" title="编辑本文"></i>
    </a>
    <a class="btn pull-right" aria-label="GitHub" href="https://github.com/flutterchina/flutter-in-action">
        <i class="fa fa-github" title="查看本书开源项目"></i>
    </a>
    <!-- Title -->
    <h1>
        <i class="fa fa-circle-o-notch fa-spin"></i>
        <a href=".." >9.6：通用“动画切换”组件（AnimatedSwitcher）</a>
    </h1>
</div>




                    <div class="page-wrapper" tabindex="-1" role="main">
                        <div class="page-inner">
                            
<div id="book-search-results">
    <div class="search-noresults">
    
                                <section class="normal markdown-section">
                                
                                <h1 id="96-&#x901A;&#x7528;&#x52A8;&#x753B;&#x5207;&#x6362;&#x7EC4;&#x4EF6;&#xFF08;animatedswitcher&#xFF09;">9.6 &#x901A;&#x7528;&#x201C;&#x52A8;&#x753B;&#x5207;&#x6362;&#x201D;&#x7EC4;&#x4EF6;&#xFF08;AnimatedSwitcher&#xFF09;</h1>
<p>&#x5B9E;&#x9645;&#x5F00;&#x53D1;&#x4E2D;&#xFF0C;&#x6211;&#x4EEC;&#x7ECF;&#x5E38;&#x4F1A;&#x9047;&#x5230;&#x5207;&#x6362;UI&#x5143;&#x7D20;&#x7684;&#x573A;&#x666F;&#xFF0C;&#x6BD4;&#x5982;Tab&#x5207;&#x6362;&#x3001;&#x8DEF;&#x7531;&#x5207;&#x6362;&#x3002;&#x4E3A;&#x4E86;&#x589E;&#x5F3A;&#x7528;&#x6237;&#x4F53;&#x9A8C;&#xFF0C;&#x901A;&#x5E38;&#x5728;&#x5207;&#x6362;&#x65F6;&#x90FD;&#x4F1A;&#x6307;&#x5B9A;&#x4E00;&#x4E2A;&#x52A8;&#x753B;&#xFF0C;&#x4EE5;&#x4F7F;&#x5207;&#x6362;&#x8FC7;&#x7A0B;&#x663E;&#x5F97;&#x5E73;&#x6ED1;&#x3002;Flutter SDK&#x7EC4;&#x4EF6;&#x5E93;&#x4E2D;&#x5DF2;&#x7ECF;&#x63D0;&#x4F9B;&#x4E86;&#x4E00;&#x4E9B;&#x5E38;&#x7528;&#x7684;&#x5207;&#x6362;&#x7EC4;&#x4EF6;&#xFF0C;&#x5982;<code>PageView</code>&#x3001;<code>TabView</code>&#x7B49;&#xFF0C;&#x4F46;&#x662F;&#xFF0C;&#x8FD9;&#x4E9B;&#x7EC4;&#x4EF6;&#x5E76;&#x4E0D;&#x80FD;&#x8986;&#x76D6;&#x5168;&#x90E8;&#x7684;&#x9700;&#x6C42;&#x573A;&#x666F;&#xFF0C;&#x4E3A;&#x6B64;&#xFF0C;Flutter SDK&#x4E2D;&#x63D0;&#x4F9B;&#x4E86;&#x4E00;&#x4E2A;<code>AnimatedSwitcher</code>&#x7EC4;&#x4EF6;&#xFF0C;&#x5B83;&#x5B9A;&#x4E49;&#x4E86;&#x4E00;&#x79CD;&#x901A;&#x7528;&#x7684;UI&#x5207;&#x6362;&#x62BD;&#x8C61;&#x3002;</p>
<h2 id="961-animatedswitcher">9.6.1 AnimatedSwitcher</h2>
<p><code>AnimatedSwitcher</code> &#x53EF;&#x4EE5;&#x540C;&#x65F6;&#x5BF9;&#x5176;&#x65B0;&#x3001;&#x65E7;&#x5B50;&#x5143;&#x7D20;&#x6DFB;&#x52A0;&#x663E;&#x793A;&#x3001;&#x9690;&#x85CF;&#x52A8;&#x753B;&#x3002;&#x4E5F;&#x5C31;&#x662F;&#x8BF4;&#x5728;<code>AnimatedSwitcher</code>&#x7684;&#x5B50;&#x5143;&#x7D20;&#x53D1;&#x751F;&#x53D8;&#x5316;&#x65F6;&#xFF0C;&#x4F1A;&#x5BF9;&#x5176;&#x65E7;&#x5143;&#x7D20;&#x548C;&#x65B0;&#x5143;&#x7D20;&#xFF0C;&#x6211;&#x4EEC;&#x5148;&#x770B;&#x770B;<code>AnimatedSwitcher</code> &#x7684;&#x5B9A;&#x4E49;&#xFF1A;</p>
<pre class="language-"><code class="lang-dart"><span class="token keyword">const</span> <span class="token function">AnimatedSwitcher</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
  Key key<span class="token punctuation">,</span>
  <span class="token keyword">this</span><span class="token punctuation">.</span>child<span class="token punctuation">,</span>
  <span class="token metadata symbol">@required</span> <span class="token keyword">this</span><span class="token punctuation">.</span>duration<span class="token punctuation">,</span> <span class="token comment">// &#x65B0;child&#x663E;&#x793A;&#x52A8;&#x753B;&#x65F6;&#x957F;</span>
  <span class="token keyword">this</span><span class="token punctuation">.</span>reverseDuration<span class="token punctuation">,</span><span class="token comment">// &#x65E7;child&#x9690;&#x85CF;&#x7684;&#x52A8;&#x753B;&#x65F6;&#x957F;</span>
  <span class="token keyword">this</span><span class="token punctuation">.</span>switchInCurve <span class="token operator">=</span> Curves<span class="token punctuation">.</span>linear<span class="token punctuation">,</span> <span class="token comment">// &#x65B0;child&#x663E;&#x793A;&#x7684;&#x52A8;&#x753B;&#x66F2;&#x7EBF;</span>
  <span class="token keyword">this</span><span class="token punctuation">.</span>switchOutCurve <span class="token operator">=</span> Curves<span class="token punctuation">.</span>linear<span class="token punctuation">,</span><span class="token comment">// &#x65E7;child&#x9690;&#x85CF;&#x7684;&#x52A8;&#x753B;&#x66F2;&#x7EBF;</span>
  <span class="token keyword">this</span><span class="token punctuation">.</span>transitionBuilder <span class="token operator">=</span> AnimatedSwitcher<span class="token punctuation">.</span>defaultTransitionBuilder<span class="token punctuation">,</span> <span class="token comment">// &#x52A8;&#x753B;&#x6784;&#x5EFA;&#x5668;</span>
  <span class="token keyword">this</span><span class="token punctuation">.</span>layoutBuilder <span class="token operator">=</span> AnimatedSwitcher<span class="token punctuation">.</span>defaultLayoutBuilder<span class="token punctuation">,</span> <span class="token comment">//&#x5E03;&#x5C40;&#x6784;&#x5EFA;&#x5668;</span>
<span class="token punctuation">}</span><span class="token punctuation">)</span>
</code></pre>
<p>&#x5F53;<code>AnimatedSwitcher</code>&#x7684;child&#x53D1;&#x751F;&#x53D8;&#x5316;&#x65F6;&#xFF08;&#x7C7B;&#x578B;&#x6216;Key&#x4E0D;&#x540C;&#xFF09;&#xFF0C;&#x65E7;child&#x4F1A;&#x6267;&#x884C;&#x9690;&#x85CF;&#x52A8;&#x753B;&#xFF0C;&#x65B0;child&#x4F1A;&#x6267;&#x884C;&#x6267;&#x884C;&#x663E;&#x793A;&#x52A8;&#x753B;&#x3002;&#x7A76;&#x7ADF;&#x6267;&#x884C;&#x4F55;&#x79CD;&#x52A8;&#x753B;&#x6548;&#x679C;&#x5219;&#x7531;<code>transitionBuilder</code>&#x53C2;&#x6570;&#x51B3;&#x5B9A;&#xFF0C;&#x8BE5;&#x53C2;&#x6570;&#x63A5;&#x53D7;&#x4E00;&#x4E2A;<code>AnimatedSwitcherTransitionBuilder</code>&#x7C7B;&#x578B;&#x7684;builder&#xFF0C;&#x5B9A;&#x4E49;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre class="language-"><code class="lang-dart"><span class="token keyword">typedef</span> AnimatedSwitcherTransitionBuilder <span class="token operator">=</span>
  Widget <span class="token function">Function</span><span class="token punctuation">(</span>Widget child<span class="token punctuation">,</span> Animation<span class="token operator">&lt;</span>double<span class="token operator">&gt;</span> animation<span class="token punctuation">)</span><span class="token punctuation">;</span>
</code></pre>
<p>&#x8BE5;<code>builder</code>&#x5728;<code>AnimatedSwitcher</code>&#x7684;child&#x5207;&#x6362;&#x65F6;&#x4F1A;&#x5206;&#x522B;&#x5BF9;&#x65B0;&#x3001;&#x65E7;child&#x7ED1;&#x5B9A;&#x52A8;&#x753B;&#xFF1A;</p>
<ol>
<li>&#x5BF9;&#x65E7;child&#xFF0C;&#x7ED1;&#x5B9A;&#x7684;&#x52A8;&#x753B;&#x4F1A;&#x53CD;&#x5411;&#x6267;&#x884C;&#xFF08;reverse&#xFF09;</li>
<li>&#x5BF9;&#x65B0;child&#xFF0C;&#x7ED1;&#x5B9A;&#x7684;&#x52A8;&#x753B;&#x4F1A;&#x6B63;&#x5411;&#x6307;&#x5411;&#xFF08;forward&#xFF09;</li>
</ol>
<p>&#x8FD9;&#x6837;&#x4E00;&#x4E0B;&#xFF0C;&#x4FBF;&#x5B9E;&#x73B0;&#x4E86;&#x5BF9;&#x65B0;&#x3001;&#x65E7;child&#x7684;&#x52A8;&#x753B;&#x7ED1;&#x5B9A;&#x3002;<code>AnimatedSwitcher</code>&#x7684;&#x9ED8;&#x8BA4;&#x503C;&#x662F;<code>AnimatedSwitcher.defaultTransitionBuilder</code> &#xFF1A;</p>
<pre class="language-"><code class="lang-dart">Widget <span class="token function">defaultTransitionBuilder</span><span class="token punctuation">(</span>Widget child<span class="token punctuation">,</span> Animation<span class="token operator">&lt;</span>double<span class="token operator">&gt;</span> animation<span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token keyword">return</span> <span class="token function">FadeTransition</span><span class="token punctuation">(</span>
    opacity<span class="token punctuation">:</span> animation<span class="token punctuation">,</span>
    child<span class="token punctuation">:</span> child<span class="token punctuation">,</span>
  <span class="token punctuation">)</span><span class="token punctuation">;</span>
<span class="token punctuation">}</span>
</code></pre>
<p>&#x53EF;&#x4EE5;&#x770B;&#x5230;&#xFF0C;&#x8FD4;&#x56DE;&#x4E86;<code>FadeTransition</code>&#x5BF9;&#x8C61;&#xFF0C;&#x4E5F;&#x5C31;&#x662F;&#x8BF4;&#x9ED8;&#x8BA4;&#x60C5;&#x51B5;&#xFF0C;<code>AnimatedSwitcher</code>&#x4F1A;&#x5BF9;&#x65B0;&#x65E7;child&#x6267;&#x884C;&#x201C;&#x6E10;&#x9690;&#x201D;&#x548C;&#x201C;&#x6E10;&#x663E;&#x201D;&#x52A8;&#x753B;&#x3002;</p>
<h3 id="&#x4F8B;&#x5B50;">&#x4F8B;&#x5B50;</h3>
<p>&#x4E0B;&#x9762;&#x6211;&#x4EEC;&#x770B;&#x4E00;&#x4E2A;&#x5217;&#x5B50;&#xFF1A;&#x5B9E;&#x73B0;&#x4E00;&#x4E2A;&#x8BA1;&#x6570;&#x5668;&#xFF0C;&#x7136;&#x540E;&#x518D;&#x6BCF;&#x4E00;&#x6B21;&#x81EA;&#x589E;&#x7684;&#x8FC7;&#x7A0B;&#x4E2D;&#xFF0C;&#x65E7;&#x6570;&#x5B57;&#x6267;&#x884C;&#x7F29;&#x5C0F;&#x52A8;&#x753B;&#x9690;&#x85CF;&#xFF0C;&#x65B0;&#x6570;&#x5B57;&#x6267;&#x884C;&#x653E;&#x5927;&#x52A8;&#x753B;&#x663E;&#x793A;&#xFF0C;&#x4EE3;&#x7801;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre class="language-"><code class="lang-dart"><span class="token keyword">import</span> <span class="token string">&apos;package:flutter/material.dart&apos;</span><span class="token punctuation">;</span>

<span class="token keyword">class</span> <span class="token class-name">AnimatedSwitcherCounterRoute</span> <span class="token keyword">extends</span> <span class="token class-name">StatefulWidget</span> <span class="token punctuation">{</span>
   <span class="token keyword">const</span> <span class="token function">AnimatedSwitcherCounterRoute</span><span class="token punctuation">(</span><span class="token punctuation">{</span>Key key<span class="token punctuation">}</span><span class="token punctuation">)</span> <span class="token punctuation">:</span> <span class="token keyword">super</span><span class="token punctuation">(</span>key<span class="token punctuation">:</span> key<span class="token punctuation">)</span><span class="token punctuation">;</span>

   <span class="token metadata symbol">@override</span>
   _AnimatedSwitcherCounterRouteState <span class="token function">createState</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token operator">=</span><span class="token operator">&gt;</span> <span class="token function">_AnimatedSwitcherCounterRouteState</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
 <span class="token punctuation">}</span>

 <span class="token keyword">class</span> <span class="token class-name">_AnimatedSwitcherCounterRouteState</span> <span class="token keyword">extends</span> <span class="token class-name">State</span><span class="token operator">&lt;</span>AnimatedSwitcherCounterRoute<span class="token operator">&gt;</span> <span class="token punctuation">{</span>
   int _count <span class="token operator">=</span> <span class="token number">0</span><span class="token punctuation">;</span>

   <span class="token metadata symbol">@override</span>
   Widget <span class="token function">build</span><span class="token punctuation">(</span>BuildContext context<span class="token punctuation">)</span> <span class="token punctuation">{</span>
     <span class="token keyword">return</span> <span class="token function">Center</span><span class="token punctuation">(</span>
       child<span class="token punctuation">:</span> <span class="token function">Column</span><span class="token punctuation">(</span>
         mainAxisAlignment<span class="token punctuation">:</span> MainAxisAlignment<span class="token punctuation">.</span>center<span class="token punctuation">,</span>
         children<span class="token punctuation">:</span> <span class="token operator">&lt;</span>Widget<span class="token operator">&gt;</span><span class="token punctuation">[</span>
           <span class="token function">AnimatedSwitcher</span><span class="token punctuation">(</span>
             duration<span class="token punctuation">:</span> <span class="token keyword">const</span> <span class="token function">Duration</span><span class="token punctuation">(</span>milliseconds<span class="token punctuation">:</span> <span class="token number">500</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
             transitionBuilder<span class="token punctuation">:</span> <span class="token punctuation">(</span>Widget child<span class="token punctuation">,</span> Animation<span class="token operator">&lt;</span>double<span class="token operator">&gt;</span> animation<span class="token punctuation">)</span> <span class="token punctuation">{</span>
               <span class="token comment">//&#x6267;&#x884C;&#x7F29;&#x653E;&#x52A8;&#x753B;</span>
               <span class="token keyword">return</span> <span class="token function">ScaleTransition</span><span class="token punctuation">(</span>child<span class="token punctuation">:</span> child<span class="token punctuation">,</span> scale<span class="token punctuation">:</span> animation<span class="token punctuation">)</span><span class="token punctuation">;</span>
             <span class="token punctuation">}</span><span class="token punctuation">,</span>
             child<span class="token punctuation">:</span> <span class="token function">Text</span><span class="token punctuation">(</span>
               <span class="token string">&apos;$_count&apos;</span><span class="token punctuation">,</span>
               <span class="token comment">//&#x663E;&#x793A;&#x6307;&#x5B9A;key&#xFF0C;&#x4E0D;&#x540C;&#x7684;key&#x4F1A;&#x88AB;&#x8BA4;&#x4E3A;&#x662F;&#x4E0D;&#x540C;&#x7684;Text&#xFF0C;&#x8FD9;&#x6837;&#x624D;&#x80FD;&#x6267;&#x884C;&#x52A8;&#x753B;</span>
               key<span class="token punctuation">:</span> ValueKey<span class="token operator">&lt;</span>int<span class="token operator">&gt;</span><span class="token punctuation">(</span>_count<span class="token punctuation">)</span><span class="token punctuation">,</span>
               style<span class="token punctuation">:</span> Theme<span class="token punctuation">.</span><span class="token function">of</span><span class="token punctuation">(</span>context<span class="token punctuation">)</span><span class="token punctuation">.</span>textTheme<span class="token punctuation">.</span>display1<span class="token punctuation">,</span>
             <span class="token punctuation">)</span><span class="token punctuation">,</span>
           <span class="token punctuation">)</span><span class="token punctuation">,</span>
           <span class="token function">RaisedButton</span><span class="token punctuation">(</span>
             child<span class="token punctuation">:</span> <span class="token keyword">const</span> <span class="token function">Text</span><span class="token punctuation">(</span><span class="token string">&apos;+1&apos;</span><span class="token punctuation">,</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
             onPressed<span class="token punctuation">:</span> <span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
               <span class="token function">setState</span><span class="token punctuation">(</span><span class="token punctuation">(</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
                 _count <span class="token operator">+=</span> <span class="token number">1</span><span class="token punctuation">;</span>
               <span class="token punctuation">}</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
             <span class="token punctuation">}</span><span class="token punctuation">,</span>
           <span class="token punctuation">)</span><span class="token punctuation">,</span>
         <span class="token punctuation">]</span><span class="token punctuation">,</span>
       <span class="token punctuation">)</span><span class="token punctuation">,</span>
     <span class="token punctuation">)</span><span class="token punctuation">;</span>
   <span class="token punctuation">}</span>
 <span class="token punctuation">}</span>
</code></pre>
<p>&#x8FD0;&#x884C;&#x793A;&#x4F8B;&#x4EE3;&#x7801;&#xFF0C;&#x5F53;&#x70B9;&#x51FB;&#x201C;+1&#x201D;&#x6309;&#x94AE;&#x65F6;&#xFF0C;&#x539F;&#x5148;&#x7684;&#x6570;&#x5B57;&#x4F1A;&#x9010;&#x6E10;&#x7F29;&#x5C0F;&#x76F4;&#x81F3;&#x9690;&#x85CF;&#xFF0C;&#x800C;&#x65B0;&#x6570;&#x5B57;&#x4F1A;&#x9010;&#x6E10;&#x653E;&#x5927;&#xFF0C;&#x6211;&#x622A;&#x53D6;&#x4E86;&#x52A8;&#x753B;&#x6267;&#x884C;&#x8FC7;&#x7A0B;&#x7684;&#x4E00;&#x5E27;&#xFF0C;&#x5982;&#x56FE;9-5&#x6240;&#x793A;&#xFF1A;</p>
<p><img src="https://pcdn.flutterchina.club/imgs/9-5.png" alt="&#x56FE;9-5"></p>
<p>&#x4E0A;&#x56FE;&#x662F;&#x7B2C;&#x4E00;&#x6B21;&#x70B9;&#x51FB;&#x201C;+1&#x201D;&#x6309;&#x94AE;&#x540E;&#x5207;&#x6362;&#x52A8;&#x753B;&#x7684;&#x4E00;&#x5E27;&#xFF0C;&#x6B64;&#x65F6;&#x201C;0&#x201D;&#x6B63;&#x5728;&#x9010;&#x6E10;&#x7F29;&#x5C0F;&#xFF0C;&#x800C;&#x201C;1&#x201D;&#x6B63;&#x5728;&#x201C;0&#x201D;&#x7684;&#x4E2D;&#x95F4;&#xFF0C;&#x6B63;&#x5728;&#x9010;&#x6E10;&#x653E;&#x5927;&#x3002;</p>
<blockquote>
<p>&#x6CE8;&#x610F;&#xFF1A;AnimatedSwitcher&#x7684;&#x65B0;&#x65E7;child&#xFF0C;&#x5982;&#x679C;&#x7C7B;&#x578B;&#x76F8;&#x540C;&#xFF0C;&#x5219;Key&#x5FC5;&#x987B;&#x4E0D;&#x76F8;&#x7B49;&#x3002;</p>
</blockquote>
<h3 id="animatedswitcher&#x5B9E;&#x73B0;&#x539F;&#x7406;">AnimatedSwitcher&#x5B9E;&#x73B0;&#x539F;&#x7406;</h3>
<p>&#x5B9E;&#x9645;&#x4E0A;&#xFF0C;<code>AnimatedSwitcher</code>&#x7684;&#x5B9E;&#x73B0;&#x539F;&#x7406;&#x662F;&#x6BD4;&#x8F83;&#x7B80;&#x5355;&#x7684;&#xFF0C;&#x6211;&#x4EEC;&#x6839;&#x636E;<code>AnimatedSwitcher</code>&#x7684;&#x4F7F;&#x7528;&#x65B9;&#x5F0F;&#x4E5F;&#x53EF;&#x4EE5;&#x731C;&#x4E2A;&#x5927;&#x6982;&#x3002;&#x8981;&#x60F3;&#x5B9E;&#x73B0;&#x65B0;&#x65E7;child&#x5207;&#x6362;&#x52A8;&#x753B;&#xFF0C;&#x53EA;&#x9700;&#x8981;&#x660E;&#x786E;&#x4E24;&#x4E2A;&#x95EE;&#x9898;&#xFF1A;&#x52A8;&#x753B;&#x6267;&#x884C;&#x7684;&#x65F6;&#x673A;&#x662F;&#x548C;&#x5982;&#x4F55;&#x5BF9;&#x65B0;&#x65E7;child&#x6267;&#x884C;&#x52A8;&#x753B;&#x3002;&#x4ECE;<code>AnimatedSwitcher</code>&#x7684;&#x4F7F;&#x7528;&#x65B9;&#x5F0F;&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x770B;&#x5230;&#xFF0C;&#x5F53;child&#x53D1;&#x751F;&#x53D8;&#x5316;&#x65F6;&#xFF08;&#x5B50;widget&#x7684;key&#x548C;&#x7C7B;&#x578B;<strong>&#x4E0D;</strong>&#x540C;&#x65F6;&#x76F8;&#x7B49;&#x5219;&#x8BA4;&#x4E3A;&#x53D1;&#x751F;&#x53D8;&#x5316;&#xFF09;&#xFF0C;&#x5219;&#x91CD;&#x65B0;&#x4F1A;&#x91CD;&#x65B0;&#x6267;&#x884C;<code>build</code>&#xFF0C;&#x7136;&#x540E;&#x52A8;&#x753B;&#x5F00;&#x59CB;&#x6267;&#x884C;&#x3002;&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x7EE7;&#x627F;StatefulWidget&#x6765;&#x5B9E;&#x73B0;<code>AnimatedSwitcher</code>&#xFF0C;&#x5177;&#x4F53;&#x505A;&#x6CD5;&#x662F;&#x5728;<code>didUpdateWidget</code> &#x56DE;&#x8C03;&#x4E2D;&#x5224;&#x65AD;&#x5176;&#x65B0;&#x65E7;child&#x662F;&#x5426;&#x53D1;&#x751F;&#x53D8;&#x5316;&#xFF0C;&#x5982;&#x679C;&#x53D1;&#x751F;&#x53D8;&#x5316;&#xFF0C;&#x5219;&#x5BF9;&#x65E7;child&#x6267;&#x884C;&#x53CD;&#x5411;&#x9000;&#x573A;&#xFF08;reverse&#xFF09;&#x52A8;&#x753B;&#xFF0C;&#x5BF9;&#x65B0;child&#x6267;&#x884C;&#x6B63;&#x5411;&#xFF08;forward&#xFF09;&#x5165;&#x573A;&#x52A8;&#x753B;&#x5373;&#x53EF;&#x3002;&#x4E0B;&#x9762;&#x662F;<code>AnimatedSwitcher</code>&#x5B9E;&#x73B0;&#x7684;&#x90E8;&#x5206;&#x6838;&#x5FC3;&#x4F2A;&#x4EE3;&#x7801;&#xFF1A;</p>
<pre class="language-"><code class="lang-dart">Widget _widget<span class="token punctuation">;</span> <span class="token comment">//</span>
<span class="token keyword">void</span> <span class="token function">didUpdateWidget</span><span class="token punctuation">(</span>AnimatedSwitcher oldWidget<span class="token punctuation">)</span> <span class="token punctuation">{</span>
  <span class="token keyword">super</span><span class="token punctuation">.</span><span class="token function">didUpdateWidget</span><span class="token punctuation">(</span>oldWidget<span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token comment">// &#x68C0;&#x67E5;&#x65B0;&#x65E7;child&#x662F;&#x5426;&#x53D1;&#x751F;&#x53D8;&#x5316;(key&#x548C;&#x7C7B;&#x578B;&#x540C;&#x65F6;&#x76F8;&#x7B49;&#x5219;&#x8FD4;&#x56DE;true&#xFF0C;&#x8BA4;&#x4E3A;&#x6CA1;&#x53D8;&#x5316;)</span>
  <span class="token keyword">if</span> <span class="token punctuation">(</span>Widget<span class="token punctuation">.</span><span class="token function">canUpdate</span><span class="token punctuation">(</span>widget<span class="token punctuation">.</span>child<span class="token punctuation">,</span> oldWidget<span class="token punctuation">.</span>child<span class="token punctuation">)</span><span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token comment">// child&#x6CA1;&#x53D8;&#x5316;&#xFF0C;...</span>
  <span class="token punctuation">}</span> <span class="token keyword">else</span> <span class="token punctuation">{</span>
    <span class="token comment">//child&#x53D1;&#x751F;&#x4E86;&#x53D8;&#x5316;&#xFF0C;&#x6784;&#x5EFA;&#x4E00;&#x4E2A;Stack&#x6765;&#x5206;&#x522B;&#x7ED9;&#x65B0;&#x65E7;child&#x6267;&#x884C;&#x52A8;&#x753B;</span>
   _widget<span class="token operator">=</span> <span class="token function">Stack</span><span class="token punctuation">(</span>
      alignment<span class="token punctuation">:</span> Alignment<span class="token punctuation">.</span>center<span class="token punctuation">,</span>
      children<span class="token punctuation">:</span><span class="token punctuation">[</span>
        <span class="token comment">//&#x65E7;child&#x5E94;&#x7528;FadeTransition</span>
        <span class="token function">FadeTransition</span><span class="token punctuation">(</span>
         opacity<span class="token punctuation">:</span> _controllerOldAnimation<span class="token punctuation">,</span>
         child <span class="token punctuation">:</span> oldWidget<span class="token punctuation">.</span>child<span class="token punctuation">,</span>
        <span class="token punctuation">)</span><span class="token punctuation">,</span>
        <span class="token comment">//&#x65B0;child&#x5E94;&#x7528;FadeTransition</span>
        <span class="token function">FadeTransition</span><span class="token punctuation">(</span>
         opacity<span class="token punctuation">:</span> _controllerNewAnimation<span class="token punctuation">,</span>
         child <span class="token punctuation">:</span> widget<span class="token punctuation">.</span>child<span class="token punctuation">,</span>
        <span class="token punctuation">)</span><span class="token punctuation">,</span>
      <span class="token punctuation">]</span>
    <span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token comment">// &#x7ED9;&#x65E7;child&#x6267;&#x884C;&#x53CD;&#x5411;&#x9000;&#x573A;&#x52A8;&#x753B;</span>
    _controllerOldAnimation<span class="token punctuation">.</span><span class="token function">reverse</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token comment">//&#x7ED9;&#x65B0;child&#x6267;&#x884C;&#x6B63;&#x5411;&#x5165;&#x573A;&#x52A8;&#x753B;</span>
    _controllerNewAnimation<span class="token punctuation">.</span><span class="token function">forward</span><span class="token punctuation">(</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>

<span class="token comment">//build&#x65B9;&#x6CD5;</span>
Widget <span class="token function">build</span><span class="token punctuation">(</span>BuildContext context<span class="token punctuation">)</span><span class="token punctuation">{</span>
  <span class="token keyword">return</span> _widget<span class="token punctuation">;</span>
<span class="token punctuation">}</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x4F2A;&#x4EE3;&#x7801;&#x5C55;&#x793A;&#x4E86;<code>AnimatedSwitcher</code>&#x5B9E;&#x73B0;&#x7684;&#x6838;&#x5FC3;&#x903B;&#x8F91;&#xFF0C;&#x5F53;&#x7136;<code>AnimatedSwitcher</code>&#x771F;&#x6B63;&#x7684;&#x5B9E;&#x73B0;&#x6BD4;&#x8FD9;&#x4E2A;&#x590D;&#x6742;&#xFF0C;&#x5B83;&#x53EF;&#x4EE5;&#x81EA;&#x5B9A;&#x4E49;&#x8FDB;&#x9000;&#x573A;&#x8FC7;&#x6E21;&#x52A8;&#x753B;&#x4EE5;&#x53CA;&#x6267;&#x884C;&#x52A8;&#x753B;&#x65F6;&#x7684;&#x5E03;&#x5C40;&#x7B49;&#x3002;&#x5728;&#x6B64;&#xFF0C;&#x6211;&#x4EEC;&#x5220;&#x7E41;&#x5C31;&#x7B80;&#xFF0C;&#x901A;&#x8FC7;&#x4F2A;&#x4EE3;&#x7801;&#x5F62;&#x5F0F;&#x8BA9;&#x8BFB;&#x8005;&#x80FD;&#x591F;&#x6E05;&#x695A;&#x770B;&#x5230;&#x4E3B;&#x8981;&#x7684;&#x5B9E;&#x73B0;&#x601D;&#x8DEF;&#xFF0C;&#x5177;&#x4F53;&#x7684;&#x5B9E;&#x73B0;&#x8BFB;&#x8005;&#x53EF;&#x4EE5;&#x53C2;&#x8003;<code>AnimatedSwitcher</code>&#x6E90;&#x7801;&#x3002;</p>
<p>&#x53E6;&#x5916;&#xFF0C;Flutter SDK&#x4E2D;&#x8FD8;&#x63D0;&#x4F9B;&#x4E86;&#x4E00;&#x4E2A;<code>AnimatedCrossFade</code>&#x7EC4;&#x4EF6;&#xFF0C;&#x5B83;&#x4E5F;&#x53EF;&#x4EE5;&#x5207;&#x6362;&#x4E24;&#x4E2A;&#x5B50;&#x5143;&#x7D20;&#xFF0C;&#x5207;&#x6362;&#x8FC7;&#x7A0B;&#x6267;&#x884C;&#x6E10;&#x9690;&#x6E10;&#x663E;&#x7684;&#x52A8;&#x753B;&#xFF0C;&#x548C;<code>AnimatedSwitcher</code>&#x4E0D;&#x540C;&#x7684;&#x662F;<code>AnimatedCrossFade</code>&#x662F;&#x9488;&#x5BF9;&#x4E24;&#x4E2A;&#x5B50;&#x5143;&#x7D20;&#xFF0C;&#x800C;<code>AnimatedSwitcher</code>&#x662F;&#x5728;&#x4E00;&#x4E2A;&#x5B50;&#x5143;&#x7D20;&#x7684;&#x65B0;&#x65E7;&#x503C;&#x4E4B;&#x95F4;&#x5207;&#x6362;&#x3002;<code>AnimatedCrossFade</code>&#x5B9E;&#x73B0;&#x539F;&#x7406;&#x6BD4;&#x8F83;&#x7B80;&#x5355;&#xFF0C;&#x4E5F;&#x6709;&#x548C;<code>AnimatedSwitcher</code>&#x7C7B;&#x4F3C;&#x7684;&#x5730;&#x65B9;&#xFF0C;&#x56E0;&#x6B64;&#x4E0D;&#x518D;&#x8D58;&#x8FF0;&#xFF0C;&#x8BFB;&#x8005;&#x6709;&#x5174;&#x8DA3;&#x53EF;&#x4EE5;&#x67E5;&#x770B;&#x5176;&#x6E90;&#x7801;&#x3002;</p>
<h2 id="962-animatedswitcher&#x9AD8;&#x7EA7;&#x7528;&#x6CD5;">9.6.2 AnimatedSwitcher&#x9AD8;&#x7EA7;&#x7528;&#x6CD5;</h2>
<p>&#x5047;&#x8BBE;&#x73B0;&#x5728;&#x6211;&#x4EEC;&#x60F3;&#x5B9E;&#x73B0;&#x4E00;&#x4E2A;&#x7C7B;&#x4F3C;&#x8DEF;&#x7531;&#x5E73;&#x79FB;&#x5207;&#x6362;&#x7684;&#x52A8;&#x753B;&#xFF1A;&#x65E7;&#x9875;&#x9762;&#x5C4F;&#x5E55;&#x4E2D;&#x5411;&#x5DE6;&#x4FA7;&#x5E73;&#x79FB;&#x9000;&#x51FA;&#xFF0C;&#x65B0;&#x9875;&#x9762;&#x91CD;&#x5C4F;&#x5E55;&#x53F3;&#x4FA7;&#x5E73;&#x79FB;&#x8FDB;&#x5165;&#x3002;&#x5982;&#x679C;&#x8981;&#x7528;AnimatedSwitcher&#x7684;&#x8BDD;&#xFF0C;&#x6211;&#x4EEC;&#x5F88;&#x5FEB;&#x5C31;&#x4F1A;&#x53D1;&#x73B0;&#x4E00;&#x4E2A;&#x95EE;&#x9898;&#xFF1A;&#x505A;&#x4E0D;&#x5230;&#xFF01;&#x6211;&#x4EEC;&#x53EF;&#x80FD;&#x4F1A;&#x5199;&#x51FA;&#x4E0B;&#x9762;&#x7684;&#x4EE3;&#x7801;&#xFF1A;</p>
<pre class="language-"><code class="lang-dart"><span class="token function">AnimatedSwitcher</span><span class="token punctuation">(</span>
  duration<span class="token punctuation">:</span> <span class="token function">Duration</span><span class="token punctuation">(</span>milliseconds<span class="token punctuation">:</span> <span class="token number">200</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
  transitionBuilder<span class="token punctuation">:</span> <span class="token punctuation">(</span>Widget child<span class="token punctuation">,</span> Animation<span class="token operator">&lt;</span>double<span class="token operator">&gt;</span> animation<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">var</span> tween<span class="token operator">=</span>Tween<span class="token operator">&lt;</span>Offset<span class="token operator">&gt;</span><span class="token punctuation">(</span>begin<span class="token punctuation">:</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">,</span> end<span class="token punctuation">:</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
     <span class="token keyword">return</span> <span class="token function">SlideTransition</span><span class="token punctuation">(</span>
       child<span class="token punctuation">:</span> child<span class="token punctuation">,</span>
       position<span class="token punctuation">:</span> tween<span class="token punctuation">.</span><span class="token function">animate</span><span class="token punctuation">(</span>animation<span class="token punctuation">)</span><span class="token punctuation">,</span>
    <span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token comment">//&#x7701;&#x7565;</span>
<span class="token punctuation">)</span>
</code></pre>
<p>&#x4E0A;&#x9762;&#x7684;&#x4EE3;&#x7801;&#x6709;&#x4EC0;&#x4E48;&#x95EE;&#x9898;&#x5462;&#xFF1F;&#x6211;&#x4EEC;&#x524D;&#x9762;&#x8BF4;&#x8FC7;&#x5728;<code>AnimatedSwitcher</code>&#x7684;child&#x5207;&#x6362;&#x65F6;&#x4F1A;&#x5206;&#x522B;&#x5BF9;&#x65B0;child&#x6267;&#x884C;&#x6B63;&#x5411;&#x52A8;&#x753B;&#xFF08;forward&#xFF09;&#xFF0C;&#x800C;&#x5BF9;&#x65E7;child&#x6267;&#x884C;&#x53CD;&#x5411;&#x52A8;&#x753B;&#xFF08;reverse&#xFF09;&#xFF0C;&#x6240;&#x4EE5;&#x771F;&#x6B63;&#x7684;&#x6548;&#x679C;&#x4FBF;&#x662F;&#xFF1A;&#x65B0;child&#x786E;&#x5B9E;&#x4ECE;&#x5C4F;&#x5E55;&#x53F3;&#x4FA7;&#x5E73;&#x79FB;&#x8FDB;&#x5165;&#x4E86;&#xFF0C;&#x4F46;&#x65E7;child&#x5374;&#x4F1A;&#x4ECE;&#x5C4F;&#x5E55;<strong>&#x53F3;&#x4FA7;</strong>&#xFF08;&#x800C;&#x4E0D;&#x662F;&#x5DE6;&#x4FA7;&#xFF09;&#x9000;&#x51FA;&#x3002;&#x5176;&#x5B9E;&#x4E5F;&#x5F88;&#x5BB9;&#x6613;&#x7406;&#x89E3;&#xFF0C;&#x56E0;&#x4E3A;&#x5728;&#x6CA1;&#x6709;&#x7279;&#x6B8A;&#x5904;&#x7406;&#x7684;&#x60C5;&#x51B5;&#x4E0B;&#xFF0C;&#x540C;&#x4E00;&#x4E2A;&#x52A8;&#x753B;&#x7684;&#x6B63;&#x5411;&#x548C;&#x9006;&#x5411;&#x6B63;&#x597D;&#x662F;&#x76F8;&#x53CD;&#xFF08;&#x5BF9;&#x79F0;&#xFF09;&#x7684;&#x3002;</p>
<p>&#x90A3;&#x4E48;&#x95EE;&#x9898;&#x6765;&#x4E86;&#xFF0C;&#x96BE;&#x9053;&#x5C31;&#x4E0D;&#x80FD;&#x4F7F;&#x7528;<code>AnimatedSwitcher</code>&#x4E86;&#xFF1F;&#x7B54;&#x6848;&#x5F53;&#x7136;&#x662F;&#x5426;&#x5B9A;&#x7684;&#xFF01;&#x4ED4;&#x7EC6;&#x60F3;&#x60F3;&#x8FD9;&#x4E2A;&#x95EE;&#x9898;&#xFF0C;&#x7A76;&#x5176;&#x539F;&#x56E0;&#xFF0C;&#x5C31;&#x662F;&#x56E0;&#x4E3A;&#x540C;&#x4E00;&#x4E2A;<code>Animation</code>&#x6B63;&#x5411;&#xFF08;forward&#xFF09;&#x548C;&#x53CD;&#x5411;&#xFF08;reverse&#xFF09;&#x662F;&#x5BF9;&#x79F0;&#x7684;&#x3002;&#x6240;&#x4EE5;&#x5982;&#x679C;&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x6253;&#x7834;&#x8FD9;&#x79CD;&#x5BF9;&#x79F0;&#x6027;&#xFF0C;&#x90A3;&#x4E48;&#x4FBF;&#x53EF;&#x4EE5;&#x5B9E;&#x73B0;&#x8FD9;&#x4E2A;&#x529F;&#x80FD;&#x4E86;&#xFF0C;&#x4E0B;&#x9762;&#x6211;&#x4EEC;&#x6765;&#x5C01;&#x88C5;&#x4E00;&#x4E2A;<code>MySlideTransition</code>&#xFF0C;&#x5B83;&#x4E0E;<code>SlideTransition</code>&#x552F;&#x4E00;&#x7684;&#x4E0D;&#x540C;&#x5C31;&#x662F;&#x5BF9;&#x52A8;&#x753B;&#x7684;&#x53CD;&#x5411;&#x6267;&#x884C;&#x8FDB;&#x884C;&#x4E86;&#x5B9A;&#x5236;&#xFF08;&#x4ECE;&#x5DE6;&#x8FB9;&#x6ED1;&#x51FA;&#x9690;&#x85CF;&#xFF09;&#xFF0C;&#x4EE3;&#x7801;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre class="language-"><code class="lang-dart"><span class="token keyword">class</span> <span class="token class-name">MySlideTransition</span> <span class="token keyword">extends</span> <span class="token class-name">AnimatedWidget</span> <span class="token punctuation">{</span>
  <span class="token function">MySlideTransition</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    Key key<span class="token punctuation">,</span>
    <span class="token metadata symbol">@required</span> Animation<span class="token operator">&lt;</span>Offset<span class="token operator">&gt;</span> position<span class="token punctuation">,</span>
    <span class="token keyword">this</span><span class="token punctuation">.</span>transformHitTests <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
    <span class="token keyword">this</span><span class="token punctuation">.</span>child<span class="token punctuation">,</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span>
      <span class="token punctuation">:</span> <span class="token keyword">assert</span><span class="token punctuation">(</span>position <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
        <span class="token keyword">super</span><span class="token punctuation">(</span>key<span class="token punctuation">:</span> key<span class="token punctuation">,</span> listenable<span class="token punctuation">:</span> position<span class="token punctuation">)</span> <span class="token punctuation">;</span>

  Animation<span class="token operator">&lt;</span>Offset<span class="token operator">&gt;</span> <span class="token keyword">get</span> position <span class="token operator">=</span><span class="token operator">&gt;</span> listenable<span class="token punctuation">;</span>
  <span class="token keyword">final</span> bool transformHitTests<span class="token punctuation">;</span>
  <span class="token keyword">final</span> Widget child<span class="token punctuation">;</span>

  <span class="token metadata symbol">@override</span>
  Widget <span class="token function">build</span><span class="token punctuation">(</span>BuildContext context<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    Offset offset<span class="token operator">=</span>position<span class="token punctuation">.</span>value<span class="token punctuation">;</span>
    <span class="token comment">//&#x52A8;&#x753B;&#x53CD;&#x5411;&#x6267;&#x884C;&#x65F6;&#xFF0C;&#x8C03;&#x6574;x&#x504F;&#x79FB;&#xFF0C;&#x5B9E;&#x73B0;&#x201C;&#x4ECE;&#x5DE6;&#x8FB9;&#x6ED1;&#x51FA;&#x9690;&#x85CF;&#x201D;</span>
    <span class="token keyword">if</span> <span class="token punctuation">(</span>position<span class="token punctuation">.</span>status <span class="token operator">==</span> AnimationStatus<span class="token punctuation">.</span>reverse<span class="token punctuation">)</span> <span class="token punctuation">{</span>
         offset <span class="token operator">=</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token operator">-</span>offset<span class="token punctuation">.</span>dx<span class="token punctuation">,</span> offset<span class="token punctuation">.</span>dy<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">return</span> <span class="token function">FractionalTranslation</span><span class="token punctuation">(</span>
      translation<span class="token punctuation">:</span> offset<span class="token punctuation">,</span>
      transformHitTests<span class="token punctuation">:</span> transformHitTests<span class="token punctuation">,</span>
      child<span class="token punctuation">:</span> child<span class="token punctuation">,</span>
    <span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<p>&#x8C03;&#x7528;&#x65F6;&#xFF0C;&#x5C06;<code>SlideTransition</code>&#x66FF;&#x6362;&#x6210;<code>MySlideTransition</code>&#x5373;&#x53EF;&#xFF1A;</p>
<pre class="language-"><code class="lang-dart"><span class="token function">AnimatedSwitcher</span><span class="token punctuation">(</span>
  duration<span class="token punctuation">:</span> <span class="token function">Duration</span><span class="token punctuation">(</span>milliseconds<span class="token punctuation">:</span> <span class="token number">200</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
  transitionBuilder<span class="token punctuation">:</span> <span class="token punctuation">(</span>Widget child<span class="token punctuation">,</span> Animation<span class="token operator">&lt;</span>double<span class="token operator">&gt;</span> animation<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">var</span> tween<span class="token operator">=</span>Tween<span class="token operator">&lt;</span>Offset<span class="token operator">&gt;</span><span class="token punctuation">(</span>begin<span class="token punctuation">:</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">,</span> end<span class="token punctuation">:</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
     <span class="token keyword">return</span> <span class="token function">MySlideTransition</span><span class="token punctuation">(</span>
              child<span class="token punctuation">:</span> child<span class="token punctuation">,</span>
              position<span class="token punctuation">:</span> tween<span class="token punctuation">.</span><span class="token function">animate</span><span class="token punctuation">(</span>animation<span class="token punctuation">)</span><span class="token punctuation">,</span>
              <span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token comment">//&#x7701;&#x7565;</span>
<span class="token punctuation">)</span>
</code></pre>
<p>&#x8FD0;&#x884C;&#x540E;&#xFF0C;&#x6211;&#x622A;&#x53D6;&#x52A8;&#x753B;&#x6267;&#x884C;&#x8FC7;&#x7A0B;&#x4E2D;&#x7684;&#x4E00;&#x5E27;&#xFF0C;&#x5982;&#x56FE;9-6&#x6240;&#x793A;&#xFF1A;</p>
<p><img src="https://pcdn.flutterchina.club/imgs/9-6.png" alt="&#x56FE;9-6"></p>
<p>&#x4E0A;&#x56FE;&#x4E2D;&#x201C;0&#x201D;&#x4ECE;&#x5DE6;&#x4FA7;&#x6ED1;&#x51FA;&#xFF0C;&#x800C;&#x201C;1&#x201D;&#x4ECE;&#x53F3;&#x4FA7;&#x6ED1;&#x5165;&#x3002;&#x53EF;&#x4EE5;&#x770B;&#x5230;&#xFF0C;&#x6211;&#x4EEC;&#x901A;&#x8FC7;&#x8FD9;&#x79CD;&#x5DE7;&#x5999;&#x7684;&#x65B9;&#x5F0F;&#x5B9E;&#x73B0;&#x4E86;&#x7C7B;&#x4F3C;&#x8DEF;&#x7531;&#x8FDB;&#x573A;&#x5207;&#x6362;&#x7684;&#x52A8;&#x753B;&#xFF0C;&#x5B9E;&#x9645;&#x4E0A;Flutter&#x8DEF;&#x7531;&#x5207;&#x6362;&#x4E5F;&#x6B63;&#x662F;&#x901A;&#x8FC7;<code>AnimatedSwitcher</code>&#x6765;&#x5B9E;&#x73B0;&#x7684;&#x3002;</p>
<h3 id="slidetransitionx">SlideTransitionX</h3>
<p>&#x4E0A;&#x9762;&#x7684;&#x793A;&#x4F8B;&#x6211;&#x4EEC;&#x5B9E;&#x73B0;&#x4E86;&#x201C;&#x5DE6;&#x51FA;&#x53F3;&#x5165;&#x201D;&#x7684;&#x52A8;&#x753B;&#xFF0C;&#x90A3;&#x5982;&#x679C;&#x8981;&#x5B9E;&#x73B0;&#x201C;&#x53F3;&#x5165;&#x5DE6;&#x51FA;&#x201D;&#x3001;&#x201C;&#x4E0A;&#x5165;&#x4E0B;&#x51FA;&#x201D;&#x6216;&#x8005; &#x201C;&#x4E0B;&#x5165;&#x4E0A;&#x51FA;&#x201D;&#x600E;&#x4E48;&#x529E;&#xFF1F;&#x5F53;&#x7136;&#xFF0C;&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x5206;&#x522B;&#x4FEE;&#x6539;&#x4E0A;&#x9762;&#x7684;&#x4EE3;&#x7801;&#xFF0C;&#x4F46;&#x662F;&#x8FD9;&#x6837;&#x6BCF;&#x79CD;&#x52A8;&#x753B;&#x90FD;&#x5F97;&#x5355;&#x72EC;&#x5B9A;&#x4E49;&#x4E00;&#x4E2A;&#x201C;Transition&#x201D;&#xFF0C;&#x8FD9;&#x5F88;&#x9EBB;&#x70E6;&#x3002;&#x672C;&#x8282;&#x5C06;&#x5206;&#x88C5;&#x4E00;&#x4E2A;&#x901A;&#x7528;&#x7684;<code>SlideTransitionX</code> &#x6765;&#x5B9E;&#x73B0;&#x8FD9;&#x79CD;&#x201C;&#x51FA;&#x5165;&#x6ED1;&#x52A8;&#x52A8;&#x753B;&#x201D;&#xFF0C;&#x4EE3;&#x7801;&#x5982;&#x4E0B;&#xFF1A;</p>
<pre class="language-"><code class="lang-dart"><span class="token keyword">class</span> <span class="token class-name">SlideTransitionX</span> <span class="token keyword">extends</span> <span class="token class-name">AnimatedWidget</span> <span class="token punctuation">{</span>
  <span class="token function">SlideTransitionX</span><span class="token punctuation">(</span><span class="token punctuation">{</span>
    Key key<span class="token punctuation">,</span>
    <span class="token metadata symbol">@required</span> Animation<span class="token operator">&lt;</span>double<span class="token operator">&gt;</span> position<span class="token punctuation">,</span>
    <span class="token keyword">this</span><span class="token punctuation">.</span>transformHitTests <span class="token operator">=</span> <span class="token boolean">true</span><span class="token punctuation">,</span>
    <span class="token keyword">this</span><span class="token punctuation">.</span>direction <span class="token operator">=</span> AxisDirection<span class="token punctuation">.</span>down<span class="token punctuation">,</span>
    <span class="token keyword">this</span><span class="token punctuation">.</span>child<span class="token punctuation">,</span>
  <span class="token punctuation">}</span><span class="token punctuation">)</span>
      <span class="token punctuation">:</span> <span class="token keyword">assert</span><span class="token punctuation">(</span>position <span class="token operator">!=</span> <span class="token keyword">null</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
        <span class="token keyword">super</span><span class="token punctuation">(</span>key<span class="token punctuation">:</span> key<span class="token punctuation">,</span> listenable<span class="token punctuation">:</span> position<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token comment">// &#x504F;&#x79FB;&#x5728;&#x5185;&#x90E8;&#x5904;&#x7406;      </span>
    <span class="token keyword">switch</span> <span class="token punctuation">(</span>direction<span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">case</span> AxisDirection<span class="token punctuation">.</span>up<span class="token punctuation">:</span>
        _tween <span class="token operator">=</span> <span class="token function">Tween</span><span class="token punctuation">(</span>begin<span class="token punctuation">:</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">,</span> end<span class="token punctuation">:</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">break</span><span class="token punctuation">;</span>
      <span class="token keyword">case</span> AxisDirection<span class="token punctuation">.</span>right<span class="token punctuation">:</span>
        _tween <span class="token operator">=</span> <span class="token function">Tween</span><span class="token punctuation">(</span>begin<span class="token punctuation">:</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">,</span> end<span class="token punctuation">:</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">break</span><span class="token punctuation">;</span>
      <span class="token keyword">case</span> AxisDirection<span class="token punctuation">.</span>down<span class="token punctuation">:</span>
        _tween <span class="token operator">=</span> <span class="token function">Tween</span><span class="token punctuation">(</span>begin<span class="token punctuation">:</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token operator">-</span><span class="token number">1</span><span class="token punctuation">)</span><span class="token punctuation">,</span> end<span class="token punctuation">:</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">break</span><span class="token punctuation">;</span>
      <span class="token keyword">case</span> AxisDirection<span class="token punctuation">.</span>left<span class="token punctuation">:</span>
        _tween <span class="token operator">=</span> <span class="token function">Tween</span><span class="token punctuation">(</span>begin<span class="token punctuation">:</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">,</span> end<span class="token punctuation">:</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span><span class="token punctuation">;</span>
        <span class="token keyword">break</span><span class="token punctuation">;</span>
    <span class="token punctuation">}</span>
  <span class="token punctuation">}</span>


  Animation<span class="token operator">&lt;</span>double<span class="token operator">&gt;</span> <span class="token keyword">get</span> position <span class="token operator">=</span><span class="token operator">&gt;</span> listenable<span class="token punctuation">;</span>

  <span class="token keyword">final</span> bool transformHitTests<span class="token punctuation">;</span>

  <span class="token keyword">final</span> Widget child<span class="token punctuation">;</span>

  <span class="token comment">//&#x9000;&#x573A;&#xFF08;&#x51FA;&#xFF09;&#x65B9;&#x5411;</span>
  <span class="token keyword">final</span> AxisDirection direction<span class="token punctuation">;</span>

  Tween<span class="token operator">&lt;</span>Offset<span class="token operator">&gt;</span> _tween<span class="token punctuation">;</span>

  <span class="token metadata symbol">@override</span>
  Widget <span class="token function">build</span><span class="token punctuation">(</span>BuildContext context<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    Offset offset <span class="token operator">=</span> _tween<span class="token punctuation">.</span><span class="token function">evaluate</span><span class="token punctuation">(</span>position<span class="token punctuation">)</span><span class="token punctuation">;</span>
    <span class="token keyword">if</span> <span class="token punctuation">(</span>position<span class="token punctuation">.</span>status <span class="token operator">==</span> AnimationStatus<span class="token punctuation">.</span>reverse<span class="token punctuation">)</span> <span class="token punctuation">{</span>
      <span class="token keyword">switch</span> <span class="token punctuation">(</span>direction<span class="token punctuation">)</span> <span class="token punctuation">{</span>
        <span class="token keyword">case</span> AxisDirection<span class="token punctuation">.</span>up<span class="token punctuation">:</span>
          offset <span class="token operator">=</span> <span class="token function">Offset</span><span class="token punctuation">(</span>offset<span class="token punctuation">.</span>dx<span class="token punctuation">,</span> <span class="token operator">-</span>offset<span class="token punctuation">.</span>dy<span class="token punctuation">)</span><span class="token punctuation">;</span>
          <span class="token keyword">break</span><span class="token punctuation">;</span>
        <span class="token keyword">case</span> AxisDirection<span class="token punctuation">.</span>right<span class="token punctuation">:</span>
          offset <span class="token operator">=</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token operator">-</span>offset<span class="token punctuation">.</span>dx<span class="token punctuation">,</span> offset<span class="token punctuation">.</span>dy<span class="token punctuation">)</span><span class="token punctuation">;</span>
          <span class="token keyword">break</span><span class="token punctuation">;</span>
        <span class="token keyword">case</span> AxisDirection<span class="token punctuation">.</span>down<span class="token punctuation">:</span>
          offset <span class="token operator">=</span> <span class="token function">Offset</span><span class="token punctuation">(</span>offset<span class="token punctuation">.</span>dx<span class="token punctuation">,</span> <span class="token operator">-</span>offset<span class="token punctuation">.</span>dy<span class="token punctuation">)</span><span class="token punctuation">;</span>
          <span class="token keyword">break</span><span class="token punctuation">;</span>
        <span class="token keyword">case</span> AxisDirection<span class="token punctuation">.</span>left<span class="token punctuation">:</span>
          offset <span class="token operator">=</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token operator">-</span>offset<span class="token punctuation">.</span>dx<span class="token punctuation">,</span> offset<span class="token punctuation">.</span>dy<span class="token punctuation">)</span><span class="token punctuation">;</span>
          <span class="token keyword">break</span><span class="token punctuation">;</span>
      <span class="token punctuation">}</span>
    <span class="token punctuation">}</span>
    <span class="token keyword">return</span> <span class="token function">FractionalTranslation</span><span class="token punctuation">(</span>
      translation<span class="token punctuation">:</span> offset<span class="token punctuation">,</span>
      transformHitTests<span class="token punctuation">:</span> transformHitTests<span class="token punctuation">,</span>
      child<span class="token punctuation">:</span> child<span class="token punctuation">,</span>
    <span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span>
<span class="token punctuation">}</span>
</code></pre>
<p>&#x73B0;&#x5728;&#x5982;&#x679C;&#x6211;&#x4EEC;&#x60F3;&#x5B9E;&#x73B0;&#x5404;&#x79CD;&#x201C;&#x6ED1;&#x52A8;&#x51FA;&#x5165;&#x52A8;&#x753B;&#x201D;&#x4FBF;&#x975E;&#x5E38;&#x5BB9;&#x6613;&#xFF0C;&#x53EA;&#x9700;&#x7ED9;<code>direction</code>&#x4F20;&#x9012;&#x4E0D;&#x540C;&#x7684;&#x65B9;&#x5411;&#x503C;&#x5373;&#x53EF;&#xFF0C;&#x6BD4;&#x5982;&#x8981;&#x5B9E;&#x73B0;&#x201C;&#x4E0A;&#x5165;&#x4E0B;&#x51FA;&#x201D;&#xFF0C;&#x5219;&#xFF1A;</p>
<pre class="language-"><code class="lang-dart"><span class="token function">AnimatedSwitcher</span><span class="token punctuation">(</span>
  duration<span class="token punctuation">:</span> <span class="token function">Duration</span><span class="token punctuation">(</span>milliseconds<span class="token punctuation">:</span> <span class="token number">200</span><span class="token punctuation">)</span><span class="token punctuation">,</span>
  transitionBuilder<span class="token punctuation">:</span> <span class="token punctuation">(</span>Widget child<span class="token punctuation">,</span> Animation<span class="token operator">&lt;</span>double<span class="token operator">&gt;</span> animation<span class="token punctuation">)</span> <span class="token punctuation">{</span>
    <span class="token keyword">var</span> tween<span class="token operator">=</span>Tween<span class="token operator">&lt;</span>Offset<span class="token operator">&gt;</span><span class="token punctuation">(</span>begin<span class="token punctuation">:</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token number">1</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">,</span> end<span class="token punctuation">:</span> <span class="token function">Offset</span><span class="token punctuation">(</span><span class="token number">0</span><span class="token punctuation">,</span> <span class="token number">0</span><span class="token punctuation">)</span><span class="token punctuation">)</span>
     <span class="token keyword">return</span> <span class="token function">SlideTransitionX</span><span class="token punctuation">(</span>
              child<span class="token punctuation">:</span> child<span class="token punctuation">,</span>
                       direction<span class="token punctuation">:</span> AxisDirection<span class="token punctuation">.</span>down<span class="token punctuation">,</span> <span class="token comment">//&#x4E0A;&#x5165;&#x4E0B;&#x51FA;</span>
              position<span class="token punctuation">:</span> animation<span class="token punctuation">,</span>
              <span class="token punctuation">)</span><span class="token punctuation">;</span>
  <span class="token punctuation">}</span><span class="token punctuation">,</span>
  <span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token punctuation">.</span><span class="token comment">//&#x7701;&#x7565;&#x5176;&#x4F59;&#x4EE3;&#x7801;</span>
<span class="token punctuation">)</span>
</code></pre>
<p>&#x8FD0;&#x884C;&#x540E;&#xFF0C;&#x6211;&#x622A;&#x53D6;&#x52A8;&#x753B;&#x6267;&#x884C;&#x8FC7;&#x7A0B;&#x4E2D;&#x7684;&#x4E00;&#x5E27;&#xFF0C;&#x5982;&#x56FE;9-7&#x6240;&#x793A;&#xFF1A;</p>
<p><img src="https://pcdn.flutterchina.club/imgs/9-7.png" alt="&#x56FE;9-7"></p>
<p>&#x4E0A;&#x56FE;&#x4E2D;&#x201C;1&#x201D;&#x4ECE;&#x5E95;&#x90E8;&#x6ED1;&#x51FA;&#xFF0C;&#x800C;&#x201C;2&#x201D;&#x4ECE;&#x9876;&#x90E8;&#x6ED1;&#x5165;&#x3002;&#x8BFB;&#x8005;&#x53EF;&#x4EE5;&#x5C1D;&#x8BD5;&#x7ED9;<code>SlideTransitionX</code>&#x7684;<code>direction</code>&#x53D6;&#x4E0D;&#x540C;&#x7684;&#x503C;&#x6765;&#x67E5;&#x770B;&#x8FD0;&#x884C;&#x6548;&#x679C;&#x3002;</p>
<h2 id="&#x603B;&#x7ED3;">&#x603B;&#x7ED3;</h2>
<p>&#x672C;&#x8282;&#x6211;&#x4EEC;&#x5B66;&#x4E60;&#x4E86;<code>AnimatedSwitcher</code>&#x7684;&#x8BE6;&#x7EC6;&#x7528;&#x6CD5;&#xFF0C;&#x540C;&#x65F6;&#x4E5F;&#x4ECB;&#x7ECD;&#x4E86;&#x6253;&#x7834;<code>AnimatedSwitcher</code>&#x52A8;&#x753B;&#x5BF9;&#x79F0;&#x6027;&#x7684;&#x65B9;&#x6CD5;&#x3002;&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x53D1;&#x73B0;&#xFF1A;&#x5728;&#x9700;&#x8981;&#x5207;&#x6362;&#x65B0;&#x65E7;UI&#x5143;&#x7D20;&#x7684;&#x573A;&#x666F;&#xFF0C;<code>AnimatedSwitcher</code>&#x5C06;&#x5341;&#x5206;&#x5B9E;&#x7528;&#x3002;</p>

                                
                                </section>
                            
    </div>
    <div class="search-results">
        <div class="has-results">
            
            <h1 class="search-results-title"><span class='search-results-count'></span> results matching "<span class='search-query'></span>"</h1>
            <ul class="search-results-list"></ul>
            
        </div>
        <div class="no-results">
            
            <h1 class="search-results-title">No results matching "<span class='search-query'></span>"</h1>
            
        </div>
    </div>
</div>

                        </div>
                    </div>
                
            </div>

            
                
                <a href="stagger_animation.html" class="navigation navigation-prev " aria-label="Previous page: 9.5：交织动画">
                    <i class="fa fa-angle-left"></i>
                </a>
                
                
                <a href="animated_widgets.html" class="navigation navigation-next " aria-label="Next page: 9.7：动画过渡组件">
                    <i class="fa fa-angle-right"></i>
                </a>
                
            
        
    </div>

    <script>
        var gitbook = gitbook || [];
        gitbook.push(function() {
            gitbook.page.hasChanged({"page":{"title":"9.6：通用“动画切换”组件（AnimatedSwitcher）","level":"3.2.6","depth":2,"next":{"title":"9.7：动画过渡组件","level":"3.2.7","depth":2,"path":"chapter9/animated_widgets.md","ref":"chapter9/animated_widgets.md","articles":[]},"previous":{"title":"9.5：交织动画","level":"3.2.5","depth":2,"path":"chapter9/stagger_animation.md","ref":"chapter9/stagger_animation.md","articles":[]},"dir":"ltr"},"config":{"plugins":["-search","search-pro","ace","splitter","prism","donate","-highlight"],"root":"docs","styles":{"website":"styles/website.css","ebook":"styles/ebook.css","pdf":"styles/pdf.css","mobi":"styles/mobi.css","epub":"styles/epub.css"},"pluginsConfig":{"prism":{"lang":{"shell":"bash"}},"ace":{},"splitter":{},"search-pro":{"cutWordLib":"nodejieba","defineWord":["Gitbook Use"]},"lunr":{"maxIndexSize":1000000,"ignoreSpecialCharacters":false},"donate":{"alipay":"","alipayText":"支付宝打赏","button":"赏","title":"","wechat":"https://cdn.jsdelivr.net/gh/flutterchina/flutter-in-action@1.0.3/docs/imgs/pay.jpeg","wechatText":"微信打赏"},"fontsettings":{"theme":"white","family":"sans","size":2},"sharing":{"facebook":true,"twitter":true,"google":false,"weibo":false,"instapaper":false,"vk":false,"all":["facebook","google","twitter","weibo","instapaper"]},"theme-default":{"styles":{"website":"styles/website.css","pdf":"styles/pdf.css","epub":"styles/epub.css","mobi":"styles/mobi.css","ebook":"styles/ebook.css","print":"styles/print.css"},"showLevel":false}},"theme":"default","author":"wendux 824783146@qq.com","bookRoot":"https://book.flutterchina.club/","pdf":{"pageNumbers":true,"fontSize":12,"fontFamily":"Arial","paperSize":"a4","chapterMark":"pagebreak","pageBreaksBefore":"/","margin":{"right":62,"left":62,"top":56,"bottom":56}},"structure":{"langs":"LANGS.md","readme":"README.md","glossary":"GLOSSARY.md","summary":"SUMMARY.md"},"variables":{},"title":"《Flutter实战》","language":"zh-hans","links":{"sharing":{"all":null,"facebook":null,"google":null,"twitter":null,"weibo":null},"sidebar":{"<div><img height=20 style='position:relative; top:5px; padding-right:5px ' src='https://cdn.jsdelivr.net/gh/flutterchina/website@1.0/images/favicon.png'/> Flutter中文网</div>":"https://flutterchina.club"}},"gitbook":"*","description":"记录Gitbook的配置和一些插件的使用"},"file":{"path":"chapter9/animated_switcher.md","mtime":"2020-03-11T12:34:13.237Z","type":"markdown"},"gitbook":{"version":"3.2.3","time":"2020-03-15T14:52:22.710Z"},"basePath":"..","book":{"language":""}});
        });
    </script>
</div>



    <script src="https://pcdn.flutterchina.club/gitbook/gitbook.js"></script>
    <script src="https://pcdn.flutterchina.club/gitbook/theme.js"></script>
    
        
        <script src="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-search-pro/jquery.mark.min.js"></script>
        
    
        
        <script src="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-search-pro/search.js"></script>
        
    
        
        <script src="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-ace/ace/ace.js"></script>
        
    
        
        <script src="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-ace/ace.js"></script>
        
    
        
        <script src="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-splitter/splitter.js"></script>
        
    
        
        <script src="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-donate/plugin.js"></script>
        
    
        
        <script src="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-lunr/lunr.min.js"></script>
        
    
        
        <script src="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-lunr/search-lunr.js"></script>
        
    
        
        <script src="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-sharing/buttons.js"></script>
        
    
        
        <script src="https://pcdn.flutterchina.club/gitbook/gitbook-plugin-fontsettings/fontsettings.js"></script>
        
    


<script src="https://pcdn.flutterchina.club/gitbook/pub.js"></script>
<script>
    hookAjax({
        open: function (arg, xhr) {
            if (location.hostname !== 'localhost') {
                if (arg[1][0] === '.') arg[1] = arg[1].slice(1);
                arg[1] = "https://pcdn.flutterchina.club" + arg[1].replace(".html", ".1")
            }
        },
        setRequestHeader: function (arg, xhr) {
            console.log(arg[0], arg[1]);
            if (arg[0] !== 'Accept') return true;
        },
        onload:function(){
            setTimeout(addAD);
        }
    })
</script>
</body>

</html>

